Redlinez

iTrader: (5)

Anyone happen to know a the size hose I need to run from the radiator neck to the front coolant pipe to bypass the throttle body? I know that the first part of the hose is bigger than the second half. I guess I would have to put a good hose clamp on gutentite on the smaller end.

maximumrebel1

Are you talking about the TB coolant bypass free mod?

Redlinez

iTrader: (5)

Yea, I wanna run one piece of hose, not put a "coupler" in the exisitng one.

nyg215

iTrader: (5)

i did the same thing i just bought reg ol radiator hose and it work great

Dal1as

I believe it was 3/8 fuel hose that I used. Then I made sure to use good clamps. Search for some writeups. That's how I found out.

HavATampa

iTrader: (49)

One side is 3/8" ID the other side is 1/4" ID. 3/8" hose should get you there if you tighten it down good enough on the small side. I used a coupler from a Brewery parts house instead of the one size hose. Hey nyg215, just how big is a reg ol radiator hose anyway?

Black Z/28

That's exactly what I did. It's a much neater job than with a by-pass kit.

tboneZ

I used 5/16". A little snug on the 3/8" radiator neck but obviously much tighter at the block. Get 3 ft so you can route it where you want.

LS1LT1

iTrader: (16)

I did the 'coupler' method and used a 1/4" barbed brass piece, it's tight enough on the 1/4" side obviously but I had to really tightem down the clamps on the 3/8" side.

My question is, am I potentially starving the flow/hurting anything by using that little 1/4" coupler instead of the more commonly used 5/16" one at all?

I have a 3/8" one I could use but it might not fit the smaller 1/4" hose.

Redlinez

iTrader: (5)

I believe I'll try the 3/8th hose. Almost forgot I had started this thread. Duh. Think there's a real hp gain from this? I remember reading on bmr's site a guy picked up 6-7rwhp but I believe it was lt1??? Either way, I'm sure it's worth doing.

LS1LT1

iTrader: (16)

Not really, but on a hot summer day at the track with the car idling in the staging lanes (I only race in the colder months personally) it might help someone a tiny bit I think.
That dyno sheet on BMRs site is interesting though, I wonder if someone really showed that kind of gain over multiple dyno runs.

2000WS6Vert

Another vote for 5/16 here. Like stated, snug at the radiator but fits perfectly on the block.

Redlinez

iTrader: (5)

Aight, going 5/16th. Just cram it on the radiator huh.

Cstick

Anyone else just plugged the ends off? I just used rubber caps, because I did not want to run the hose for appearance reasons.